Analysis
- max time kernel
126s - max time network
139s - platform
windows7_x64 - resource
win7-20240704-en - resource tags
- submitted
18/08/2024, 22:16
General
- Target Client-built.exe
- Size 3.4MB
- Sample240818-16w22axflh
- SHA256 f3de21ec995555ab187ce0a254d2b353c1ed3c06030678f898ec56efabbae51f
Malware Config
Extracted
-
quasar
-
1.4.1
-
SKIDS
-
147.185.221.22:10340
-
9b51d4f5-bfe4-4a06-ba47-dcfbf9fe8529
-
encryption_key
AEAE9E349BB922A243A5FF22FF4A80613533B71B
-
install_name
Windows Host Process.exe
-
log_directory
Windows-Logs
-
reconnect_delay
3000
-
startup_key
Windows Host Process
-
subdirectory
Windows
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 3 IoCs
- Executes dropped EXE 1 IoCs
- Drops file in System32 directory 5 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Users\Admin\AppData\Local\Temp\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\Windows\Windows Host Process.exe"C:\Windows\system32\Windows\Windows Host Process.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Windows Host Process.exe
memory/2564-0-0x000007FEF5013000-0x000007FEF5014000-memory.dmp
memory/2564-1-0x0000000000280000-0x00000000005E0000-memory.dmp
memory/2564-2-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp
memory/2564-9-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp
memory/2920-8-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp
memory/2920-10-0x0000000000850000-0x0000000000BB0000-memory.dmp
memory/2920-11-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp
memory/2920-12-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp